iio: adc: ad-sigma-delta: Allow custom IRQ flags

Before this patch the ad_sigma_delta implementation hardcoded
the irq trigger type to low, assuming that all Sigma-Delta ADCs
have the same interrupt-type.

This patch allows all drivers using the ad_sigma_delta layer to set the
irq trigger type to the one specified in the datasheet.

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

6 files changed, 8 insertions, 1 deletions

diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 3f03abf100b5..63df2e2a8caf 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -9,6 +9,7 @@
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
@@ -224,6 +225,7 @@ static const struct ad_sigma_delta_info ad7124_sigma_delta_info = {
 	.addr_shift = 0,
 	.read_mask = BIT(6),
 	.data_reg = AD7124_DATA,
+	.irq_flags = IRQF_TRIGGER_LOW,
 };
 
 static int ad7124_set_channel_odr(struct ad7124_state *st,
diff --git a/drivers/iio/adc/ad7780.c b/drivers/iio/adc/ad7780.c
index 217a5a5c3c6d..291c1a898129 100644
--- a/drivers/iio/adc/ad7780.c
+++ b/drivers/iio/adc/ad7780.c
@@ -203,6 +203,7 @@ static const struct ad_sigma_delta_info ad7780_sigma_delta_info = {
 	.set_mode = ad7780_set_mode,
 	.postprocess_sample = ad7780_postprocess_sample,
 	.has_registers = false,
+	.irq_flags = IRQF_TRIGGER_LOW,
 };
 
 #define AD7780_CHANNEL(bits, wordsize) \
diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
index 54025ea10239..abb239392631 100644
--- a/drivers/iio/adc/ad7791.c
+++ b/drivers/iio/adc/ad7791.c
@@ -205,6 +205,7 @@ static const struct ad_sigma_delta_info ad7791_sigma_delta_info = {
 	.has_registers = true,
 	.addr_shift = 4,
 	.read_mask = BIT(3),
+	.irq_flags = IRQF_TRIGGER_LOW,
 };
 
 static int ad7791_read_raw(struct iio_dev *indio_dev,
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index bbc41ecf0d2f..b747db97f78a 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -206,6 +206,7 @@ static const struct ad_sigma_delta_info ad7793_sigma_delta_info = {
 	.has_registers = true,
 	.addr_shift = 3,
 	.read_mask = BIT(6),
+	.irq_flags = IRQF_TRIGGER_LOW,
 };
 
 static const struct ad_sd_calib_data ad7793_calib_arr[6] = {
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 8ba90486c787..8115b6de1d6c 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -500,7 +500,7 @@ static int ad_sd_probe_trigger(struct iio_dev *indio_dev)
 
 	ret = request_irq(sigma_delta->spi->irq,
 			  ad_sd_data_rdy_trig_poll,
-			  IRQF_TRIGGER_LOW,
+			  sigma_delta->info->irq_flags,
 			  indio_dev->name,
 			  sigma_delta);
 	if (ret)
diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h
index 8a4e25a7080c..5a127c0ed200 100644
--- a/include/linux/iio/adc/ad_sigma_delta.h
+++ b/include/linux/iio/adc/ad_sigma_delta.h
@@ -40,6 +40,7 @@ struct iio_dev;
  * @read_mask: Mask for the communications register having the read bit set.
  * @data_reg: Address of the data register, if 0 the default address of 0x3 will
  *   be used.
+ * @irq_flags: flags for the interrupt used by the triggered buffer
  */
 struct ad_sigma_delta_info {
 	int (*set_channel)(struct ad_sigma_delta *, unsigned int channel);
@@ -49,6 +50,7 @@ struct ad_sigma_delta_info {
 	unsigned int addr_shift;
 	unsigned int read_mask;
 	unsigned int data_reg;
+	unsigned long irq_flags;
 };
 
 /**